What did Stephen cry out as he fell on his knees and died?

Answer: Do not hold this sin against them

Falling on his knees, Stephen cried out, "Lord, do not hold this sin against them," and then he fell asleep.

“Falling on his knees, he cried out in a loud voice, “Lord, do not hold this sin against them.” And when he had said this, he fell asleep.”— Acts 7:60 (BSB)